/Engine/Source/Editor/UnrealEd/Public/Kismet2/BlueprintEditorUtils.h
Adds a local variable to the function graph. It cannot mask a member variable or a variable in any superclass.
true if it succeeds, false if it fails.
static bool AddLocalVariable ( [UBlueprint](API\Runtime\Engine\Engine\UBlueprint) * Blueprint, [UEdGraph](API\Runtime\Engine\EdGraph\UEdGraph) * InTargetGraph, const [FName](API\Runtime\Core\UObject\FName) InNewVarName, const [FEdGraphPinType](API\Runtime\Engine\EdGraph\FEdGraphPinType) & InNewVarType, const [FString](API\Runtime\Core\Containers\FString) & DefaultValue )